Neutrino masses and tribimaximal mixing in the minimal renormalizable supersymmetric SU(5) grand unified model with A4 flavor symmetry

TL;DR

This paper explores extensions of a minimal SUSY SU(5) GUT model with A4 flavor symmetry, identifying a unique phenomenologically viable case that predicts neutrino masses around 0.1 eV with an inverted hierarchy.

Contribution

It introduces a detailed analysis of possible A4-symmetric extensions of the minimal SUSY SU(5) model, highlighting a specific case with realistic fermion masses and mixing angles.

Findings

Neutrino masses around 0.1 eV

Inverted neutrino mass hierarchy

One phenomenologically viable extension identified

Abstract

We analyze all possible extensions of the recently proposed minimal renormalizable SUSY SU(5) grand unified model with the inclusion of an additional A4 flavor symmetry. We find that there are five possible cases but only one of them is phenomenologically interesting. We develop in detail such case and we show how the fermion masses and mixing angles come out. As a prediction we obtain the neutrino masses of order of 0.1 eV with an inverted hierarchy.